I just got a new M1730 about a week ago and have been unsuccessful so far in figuring out how to illuminnate the keyboard. I know the shortcut is supposed to be Fn + the right arrow key, but this doesn't work. A little icon appears in the bottom right corner of the screen that seems to show that I'm turning the keyboard illumination on and off, but the actual keyboard does nothing. Is there any other way to turn it on?